Comments

Humpback Bridge

Posted June 5, 2013, by Jason Smith (JDSmith77 [at] gmx [dot] net)

I think I have the problem solved. This bridge was a Pratt half-hip pony truss bridge with pinned connections built in 1901 by the New Columbus Bridge Company of Columbus, OH. This according to a bridge survey conducted by Fraser Design in the 1990s. In either case, it's really sad that the bridge is gone by the floods.

Humpback Bridge

Posted June 3, 2013, by K. A. Erickson

Pratt, Parker, either way it just underscores the fact that we need more images on the ground. Our efforts should/shall continue. If not us, then who?

Please clarify. The collapsed bridge pictured appears to be a pin-connected pony truss bridge. Pin connected bridges are usually (or never?) polygonal Warrens, which also almost always date to after 1908, and usually after 1920. There is not enough detail in the Birds Eye View for me to see anything worthwhile. My guess is it was really a Pratt.

Humpback Bridge

Posted May 31, 2013, by B. Lauver (bllauver [at] toad [dot] net)

Why is it called Humpback Bridge? The aerial photo seems to show a flat pony truss.